Casement-window fastener



April 16, 1929. A. HOFFMAN 1,709,433

CASEMENT WINDOW FASTENER Filed Oct. 2, 1926 Patented Apr. 16, 1929.

UNITED STATES PATENT'OFFLICE.

ANDR W HOFFMAN, or CHICAGO, ILLINOIS, ASSIGNOR r ANDREW norm/IAN M NU- FACTURING COMPANY, OECHICAGO, IL INoIs; A CORPOR TION or ILLI oIs.

oAsEMENT wINDoWrAsrE nn;

Application fil ed October 2, 1926. iserial No. 139,070.

The purpose of this invention is to provide an improved fastener for in-swingmg casement windows.

\Vhile' the foregoing statment is indicative in'a general way of the nature of the invention, other objects-and advantages W1ll be apparent to those skilled in the art upon a full understanding of the construction,

' arrangement and operation of the improvedfastener.

One form of the invention is presented herein for the purpose of exemplification, but it will of course be understood that the invention is susceptible of embodiment in other structurally modified forms coming equally within the comprehensive scope of the appended claims. I I

In the accompanying drawing:

Fig. 1 is an inside view of an in-swinging an easement window .which is equipped with the fastener of the invention;

Fig. 2 is a horizontal section through the window at the location of the fastener,

showing the window slightly ajar and the fastener in unlatched position;

Fig. 3 is a similar View, but showing the window closed and the fastener in latched position;

Fig. 4 is a front view of the fastener, with the movable portions thereof shown .infull lines in unlatched positionand in dotted lines in latched position; and I Fig. 5 is a side view of the fastener, with the movable portions thereof shown in 5 latched position.

It will be observed in the drawing that the fastener is applied to the inner face of the free stile 10 of a single in-swinging casement window 11. A strike 12, which constitutes a part of the fastener, is applied to the jamb 13 of the frame of the window. The outer face of the stile 10 bears against the usual stop 14 onthe amb when the window is closed, and the function of the fastener is to force the stile 10 tightly against the stop 14 and maintain'it in such position.

The fastener includes a bracket 15; arod 16 which is both shiftably and rotatably plate having spaced vertically extending 16 with the long axis of the 'mounted in the bracket; a cam 17 secured to A cars 19 at the sides thereof. The plate is apertured for the reception of attaching screws 20, and the ears are apertured for the reception of therod 16. The cam 17 is of oval form, and is secured eccentri'cally to the outer end of the rod 16, The outer ear 19 of the bracket 15 is located inwardly from the edge of the stile a distance substantially the width of the cam, and, when the rod 16 is shiftedinwardly away from the strike, as shown in Figs. 2 and 4, the outer face 21 of the cam will be aboutfiush with with outer edge of the stile and will clear the jamb and the strike when'the window is being opened or closed.

The handle 18 is an elongated lever, and

. the free end of the handle is formed into a ring for ease in manipulation. The handle is not secured to the rod at a point close to the inner car 19 of the bracket, but is spaced inwardly a substantial distance from the ear to permit the handle, rod and cam to be shifted outwardly into a position wherein the cam may be latched with the strike, as shown in Figs. 3 and 5. The handle, rod and cam are normally maintained in an inwardly shifted position by means of a light coil spring 22 which encircles the rod between the handle 18 and the inner ear 19 of the bracket. The spring 22 bears against a thin thrust washer 23 between the same and the ear. The handle and cam are secured to the ends of the rod cam perpendicular to that of the handle. V

The strike 12 is set flush in the jamb, and is provided with an aperture 24 which registers with an aperture 25 in the'jamb. The strike is provided with an inside surface 26' against which the cam 17 is adapted to bear when it is turned into its latched position, wherein the long axis of-the cam is perpendicular to such surface. The aperture 24 in the strike is preferably so shaped and arranged as to leave a one edge of the surface 26, which flange effectively prevents the cam 17 when in engagement with the surface 26 from shiftinginwardly and out of engagement with the same under the influence of the spring 22. I

The flange 27 maybe eliminated, as the spring 22need only have sufficient strength to shift the handle, rod and cam inwardly and maintain them so when the-fastener is not in use. The'spring 22 also may be elimislight flange 27 along i nated, as the :ha ndle,rod and cam may be shifted ananuall-y. i

The wedging action of the cam 17 against the surface 26 of the strike will always force the window tightly against the stop 14: on

the jamb irrespective of'the' extent to which the window may have warped, thus insuring a tight, weatherproof and noiseless? closure of: the window when inclosed position.

I claim:

1. A casement window fastener, comprising a-hracket adapted to be attached to the stile of casementwindow. a rod 'shiftably and rotatably iinounted in the bracket, an elongated cam platesecuredto and extending laterally trom the 1 0d, an elongated handle also secured .to andiextending laterally froin the rodat nightianglesto the cam plate for shifting;iand i'otating the rod, and a strike adapted "to be attached to the jamb of the frame of thewindow in such relation to the bracketas to clear the cam plate when the 'I'QCliSliILltS inwardly shifteclposition and the window is being closed and to be engaged by the periphery of the tiee end of the cam plate whentthe i'odis in its upwardly shifted and downwardlyturned position and the window ls-closed.

2. A casement- Window fastener, comprising a bracket adapted to be attached to the stile of a casement window, a rodshi'ftably and iotatablylnounted in the bracketya cain secui'edto the tool, a handle also secured to the rod for shifting and rotating the same,

:and a strike adapted to be attached to the In testimony whereof I have hereunto subscribed my name.

ANDREW HOFFMAN.

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